2006.
I have been living in Tokyo since 2005, and I guess it was the natural thing to do when you are completely surrounded by Keirin bikes (haven't bought a Keirin frame yet though.... LAME). I was riding a Ridgeback Genesis Day 02 from the UK. Then I got a used Langster Chicago first because I wanted bullhorns and I liked the black frame. That rode really nice, but surrounded by track frames led me to dislike the sloping TT. So then I got a Bianchi Pista (Japan edition.) Then I sold that and eventually after a FG break I got my current Masi (Although I wanted a Fuji Track Comp, but they were completely sold out in Japan when I was looking. They should be coming into stock soon though).
I might end up getting a Keirin frame soon though! Or maybe get a frame built for me! Purhaps Level??